diff --git a/src/core/border_router/routing_manager.cpp b/src/core/border_router/routing_manager.cpp
index ca9218eeb..87e9400fc 100644
--- a/src/core/border_router/routing_manager.cpp
+++ b/src/core/border_router/routing_manager.cpp
@@ -129,12 +129,12 @@ Error RoutingManager::LoadOrGenerateRandomOmrPrefix(void)
     {
         Ip6::NetworkPrefix randomOmrPrefix;
 
-        otLogNoteBr("no valid OMR prefix found in settings, generating new one");
+        otLogNoteBr("No valid OMR prefix found in settings, generating new one");
 
         error = randomOmrPrefix.GenerateRandomUla();
         if (error != kErrorNone)
         {
-            otLogCritBr("failed to generate random OMR prefix");
+            otLogCritBr("Failed to generate random OMR prefix");
             ExitNow();
         }
 
@@ -155,12 +155,12 @@ Error RoutingManager::LoadOrGenerateRandomOnLinkPrefix(void)
     {
         Ip6::NetworkPrefix randomOnLinkPrefix;
 
-        otLogNoteBr("no valid on-link prefix found in settings, generating new one");
+        otLogNoteBr("No valid on-link prefix found in settings, generating new one");
 
         error = randomOnLinkPrefix.GenerateRandomUla();
         if (error != kErrorNone)
         {
-            otLogCritBr("failed to generate random on-link prefix");
+            otLogCritBr("Failed to generate random on-link prefix");
             ExitNow();
         }
 
@@ -268,7 +268,7 @@ void RoutingManager::RecvIcmp6Message(uint32_t            aInfraIfIndex,
 exit:
     if (error != kErrorNone)
     {
-        otLogDebgBr("drop ICMPv6 message: %s", ErrorToString(error));
+        otLogDebgBr("Dropped ICMPv6 message: %s", ErrorToString(error));
     }
 }
 
@@ -280,7 +280,7 @@ Error RoutingManager::HandleInfraIfStateChanged(uint32_t aInfraIfIndex, bool aIs
     VerifyOrExit(aInfraIfIndex == mInfraIfIndex, error = kErrorInvalidArgs);
     VerifyOrExit(aIsRunning != mInfraIfIsRunning);
 
-    otLogInfoBr("infra interface (%u) state changed: %sRUNNING -> %sRUNNING", aInfraIfIndex,
+    otLogInfoBr("Infra interface (%u) state changed: %sRUNNING -> %sRUNNING", aInfraIfIndex,
                 (mInfraIfIsRunning ? "" : "NOT "), (aIsRunning ? "" : "NOT "));
 
     mInfraIfIsRunning = aIsRunning;
@@ -341,7 +341,7 @@ uint8_t RoutingManager::EvaluateOmrPrefix(Ip6::Prefix *aNewOmrPrefixes, uint8_t
 
         if (newOmrPrefixNum >= aMaxOmrPrefixNum)
         {
-            otLogWarnBr("EvaluateOmrPrefix: too many OMR prefixes, ignoring prefix %s",
+            otLogWarnBr("EvaluateOmrPrefix: Too many OMR prefixes, ignoring prefix %s",
                         onMeshPrefixConfig.GetPrefix().ToString().AsCString());
             continue;
         }
@@ -361,7 +361,7 @@ uint8_t RoutingManager::EvaluateOmrPrefix(Ip6::Prefix *aNewOmrPrefixes, uint8_t
     // Decide if we need to add or remove my local OMR prefix.
     if (newOmrPrefixNum == 0)
     {
-        otLogInfoBr("EvaluateOmrPrefix: no valid OMR prefixes found in Thread network");
+        otLogInfoBr("EvaluateOmrPrefix: No valid OMR prefixes found in Thread network");
         if (PublishLocalOmrPrefix() == kErrorNone)
         {
             aNewOmrPrefixes[newOmrPrefixNum++] = mLocalOmrPrefix;
@@ -371,7 +371,7 @@ uint8_t RoutingManager::EvaluateOmrPrefix(Ip6::Prefix *aNewOmrPrefixes, uint8_t
     }
     else if (publishedLocalOmrPrefix != nullptr && smallestOmrPrefix != publishedLocalOmrPrefix)
     {
-        otLogInfoBr("EvaluateOmrPrefix: there is already a smaller OMR prefix %s in the Thread network",
+        otLogInfoBr("EvaluateOmrPrefix: There is already a smaller OMR prefix %s in the Thread network",
                     smallestOmrPrefix->ToString().AsCString());
         UnpublishLocalOmrPrefix();
 
@@ -401,13 +401,13 @@ Error RoutingManager::PublishLocalOmrPrefix(void)
     error = Get<NetworkData::Local>().AddOnMeshPrefix(omrPrefixConfig);
     if (error != kErrorNone)
     {
-        otLogWarnBr("failed to publish local OMR prefix %s in Thread network: %s",
+        otLogWarnBr("Failed to publish local OMR prefix %s in Thread network: %s",
                     mLocalOmrPrefix.ToString().AsCString(), ErrorToString(error));
     }
     else
     {
         Get<NetworkData::Notifier>().HandleServerDataUpdated();
-        otLogInfoBr("published local OMR prefix %s in Thread network", mLocalOmrPrefix.ToString().AsCString());
+        otLogInfoBr("Published local OMR prefix %s in Thread network", mLocalOmrPrefix.ToString().AsCString());
     }
 
     return error;
@@ -422,12 +422,12 @@ void RoutingManager::UnpublishLocalOmrPrefix(void)
     SuccessOrExit(error = Get<NetworkData::Local>().RemoveOnMeshPrefix(mLocalOmrPrefix));
 
     Get<NetworkData::Notifier>().HandleServerDataUpdated();
-    otLogInfoBr("unpublished local OMR prefix %s from Thread network", mLocalOmrPrefix.ToString().AsCString());
+    otLogInfoBr("Unpublished local OMR prefix %s from Thread network", mLocalOmrPrefix.ToString().AsCString());
 
 exit:
     if (error != kErrorNone)
     {
-        otLogWarnBr("failed to unpublish local OMR prefix %s from Thread network: %s",
+        otLogWarnBr("Failed to unpublish local OMR prefix %s from Thread network: %s",
                     mLocalOmrPrefix.ToString().AsCString(), ErrorToString(error));
     }
 }
@@ -447,12 +447,12 @@ Error RoutingManager::AddExternalRoute(const Ip6::Prefix &aPrefix, otRoutePrefer
     error = Get<NetworkData::Local>().AddHasRoutePrefix(routeConfig);
     if (error != kErrorNone)
     {
-        otLogWarnBr("failed to add external route %s: %s", aPrefix.ToString().AsCString(), ErrorToString(error));
+        otLogWarnBr("Failed to add external route %s: %s", aPrefix.ToString().AsCString(), ErrorToString(error));
     }
     else
     {
         Get<NetworkData::Notifier>().HandleServerDataUpdated();
-        otLogInfoBr("added external route %s", aPrefix.ToString().AsCString());
+        otLogInfoBr("Added external route %s", aPrefix.ToString().AsCString());
     }
 
     return error;
@@ -467,12 +467,12 @@ void RoutingManager::RemoveExternalRoute(const Ip6::Prefix &aPrefix)
     SuccessOrExit(error = Get<NetworkData::Local>().RemoveHasRoutePrefix(aPrefix));
 
     Get<NetworkData::Notifier>().HandleServerDataUpdated();
-    otLogInfoBr("removed external route %s", aPrefix.ToString().AsCString());
+    otLogInfoBr("Removed external route %s", aPrefix.ToString().AsCString());
 
 exit:
     if (error != kErrorNone)
     {
-        otLogWarnBr("failed to remove external route %s: %s", aPrefix.ToString().AsCString(), ErrorToString(error));
+        otLogWarnBr("Failed to remove external route %s: %s", aPrefix.ToString().AsCString(), ErrorToString(error));
     }
 }
 
@@ -539,7 +539,7 @@ const Ip6::Prefix *RoutingManager::EvaluateOnLinkPrefix(void)
         }
         else
         {
-            otLogInfoBr("EvaluateOnLinkPrefix: there is already smaller on-link prefix %s on interface %u",
+            otLogInfoBr("EvaluateOnLinkPrefix: There is already smaller on-link prefix %s on interface %u",
                         smallestOnLinkPrefix->ToString().AsCString(), mInfraIfIndex);
 
             // TODO: we remove the advertised on-link prefix by setting zero valid lifetime for PIO,
@@ -568,7 +568,7 @@ void RoutingManager::EvaluateRoutingPolicy(void)
     Ip6::Prefix        newOmrPrefixes[kMaxOmrPrefixNum];
     uint8_t            newOmrPrefixNum = 0;
 
-    otLogInfoBr("evaluating routing policy");
+    otLogInfoBr("Evaluating routing policy");
 
     // 0. Evaluate on-link & OMR prefixes.
     newOnLinkPrefix = EvaluateOnLinkPrefix();
@@ -581,7 +581,7 @@ void RoutingManager::EvaluateRoutingPolicy(void)
         // This is the very exceptional case and happens only when we failed to publish
         // our local OMR prefix to the Thread network. We schedule the Router Advertisement
         // timer to re-evaluate our routing policy in the future.
-        otLogWarnBr("no OMR prefix advertised! Start Router Advertisement timer for future evaluation");
+        otLogWarnBr("No OMR prefix advertised! Start Router Advertisement timer for future evaluation");
     }
 
     // 2. Schedule Router Advertisement timer with random interval.
@@ -595,7 +595,7 @@ void RoutingManager::EvaluateRoutingPolicy(void)
             nextSendTime = kMaxInitRtrAdvInterval;
         }
 
-        otLogInfoBr("router advertisement scheduled in %u seconds", nextSendTime);
+        otLogInfoBr("Router advertisement scheduled in %u seconds", nextSendTime);
         mRouterAdvertisementTimer.Start(Time::SecToMsec(nextSendTime));
     }
 
@@ -615,7 +615,7 @@ void RoutingManager::StartRoutingPolicyEvaluationDelay(void)
     static_assert(kMaxRoutingPolicyDelay > 0, "invalid maximum routing policy evaluation delay");
     randomDelay = Random::NonCrypto::GetUint32InRange(0, Time::SecToMsec(kMaxRoutingPolicyDelay));
 
-    otLogInfoBr("start evaluating routing policy, scheduled in %u milliseconds", randomDelay);
+    otLogInfoBr("Start evaluating routing policy, scheduled in %u milliseconds", randomDelay);
     mRoutingPolicyTimer.Start(randomDelay);
 }
 
@@ -632,7 +632,7 @@ void RoutingManager::StartRouterSolicitationDelay(void)
     static_assert(kMaxRtrSolicitationDelay > 0, "invalid maximum Router Solicitation delay");
     randomDelay = Random::NonCrypto::GetUint32InRange(0, Time::SecToMsec(kMaxRtrSolicitationDelay));
 
-    otLogInfoBr("start Router Solicitation, scheduled in %u milliseconds", randomDelay);
+    otLogInfoBr("Start Router Solicitation, scheduled in %u milliseconds", randomDelay);
     mTimeRouterSolicitStart = TimerMilli::GetNow();
     mRouterSolicitTimer.Start(randomDelay);
 
@@ -686,11 +686,11 @@ void RoutingManager::SendRouterAdvertisement(const Ip6::Prefix *aNewOmrPrefixes,
 
         if (mAdvertisedOnLinkPrefix == nullptr)
         {
-            otLogInfoBr("start advertising new on-link prefix %s on interface %u",
+            otLogInfoBr("Start advertising new on-link prefix %s on interface %u",
                         aNewOnLinkPrefix->ToString().AsCString(), mInfraIfIndex);
         }
 
-        otLogInfoBr("send on-link prefix %s in PIO (valid lifetime = %u seconds)",
+        otLogInfoBr("Send on-link prefix %s in PIO (valid lifetime = %u seconds)",
                     aNewOnLinkPrefix->ToString().AsCString(), kDefaultOnLinkPrefixLifetime);
     }
     else if (mAdvertisedOnLinkPrefix != nullptr)
@@ -709,7 +709,7 @@ void RoutingManager::SendRouterAdvertisement(const Ip6::Prefix *aNewOmrPrefixes,
         memcpy(buffer + bufferLength, &pio, pio.GetSize());
         bufferLength += pio.GetSize();
 
-        otLogInfoBr("stop advertising on-link prefix %s on interface %u",
+        otLogInfoBr("Stop advertising on-link prefix %s on interface %u",
                     mAdvertisedOnLinkPrefix->ToString().AsCString(), mInfraIfIndex);
     }
 
@@ -730,7 +730,7 @@ void RoutingManager::SendRouterAdvertisement(const Ip6::Prefix *aNewOmrPrefixes,
             memcpy(buffer + bufferLength, &rio, rio.GetSize());
             bufferLength += rio.GetSize();
 
-            otLogInfoBr("stop advertising OMR prefix %s on interface %u", advertisedOmrPrefix.ToString().AsCString(),
+            otLogInfoBr("Stop advertising OMR prefix %s on interface %u", advertisedOmrPrefix.ToString().AsCString(),
                         mInfraIfIndex);
         }
     }
@@ -747,7 +747,7 @@ void RoutingManager::SendRouterAdvertisement(const Ip6::Prefix *aNewOmrPrefixes,
         memcpy(buffer + bufferLength, &rio, rio.GetSize());
         bufferLength += rio.GetSize();
 
-        otLogInfoBr("send OMR prefix %s in RIO (valid lifetime = %u seconds)", newOmrPrefix.ToString().AsCString(),
+        otLogInfoBr("Send OMR prefix %s in RIO (valid lifetime = %u seconds)", newOmrPrefix.ToString().AsCString(),
                     kDefaultOmrPrefixLifetime);
     }
 
@@ -764,14 +764,14 @@ void RoutingManager::SendRouterAdvertisement(const Ip6::Prefix *aNewOmrPrefixes,
 
         if (error == kErrorNone)
         {
-            otLogInfoBr("sent Router Advertisement on interface %u", mInfraIfIndex);
+            otLogInfoBr("Sent Router Advertisement on interface %u", mInfraIfIndex);
 #if OPENTHREAD_CONFIG_REFERENCE_DEVICE_ENABLE
             otDumpCertBr("[BR-CERT] direction=send | type=RA |", buffer, bufferLength);
 #endif
         }
         else
         {
-            otLogWarnBr("failed to send Router Advertisement on interface %u: %s", mInfraIfIndex, ErrorToString(error));
+            otLogWarnBr("Failed to send Router Advertisement on interface %u: %s", mInfraIfIndex, ErrorToString(error));
         }
     }
 }
@@ -808,7 +808,7 @@ void RoutingManager::HandleRouterAdvertisementTimer(Timer &aTimer)
 
 void RoutingManager::HandleRouterAdvertisementTimer(void)
 {
-    otLogInfoBr("router advertisement timer triggered");
+    otLogInfoBr("Router advertisement timer triggered");
 
     EvaluateRoutingPolicy();
 }
@@ -820,7 +820,7 @@ void RoutingManager::HandleVicariousRouterSolicitTimer(Timer &aTimer)
 
 void RoutingManager::HandleVicariousRouterSolicitTimer(void)
 {
-    otLogInfoBr("vicarious router solicitation time out");
+    otLogInfoBr("Vicarious router solicitation time out");
 
     for (uint8_t i = 0; i < mDiscoveredPrefixNum; ++i)
     {
@@ -841,7 +841,7 @@ void RoutingManager::HandleRouterSolicitTimer(Timer &aTimer)
 
 void RoutingManager::HandleRouterSolicitTimer(void)
 {
-    otLogInfoBr("router solicitation times out");
+    otLogInfoBr("Router solicitation times out");
 
     if (mRouterSolicitCount < kMaxRtrSolicitations)
     {
@@ -853,17 +853,17 @@ void RoutingManager::HandleRouterSolicitTimer(void)
 
         if (error == kErrorNone)
         {
-            otLogDebgBr("successfully sent %uth Router Solicitation", mRouterSolicitCount);
+            otLogDebgBr("Successfully sent %uth Router Solicitation", mRouterSolicitCount);
         }
         else
         {
-            otLogCritBr("failed to send %uth Router Solicitation: %s", mRouterSolicitCount, ErrorToString(error));
+            otLogCritBr("Failed to send %uth Router Solicitation: %s", mRouterSolicitCount, ErrorToString(error));
         }
 
         nextSolicitationDelay =
             (mRouterSolicitCount == kMaxRtrSolicitations) ? kMaxRtrSolicitationDelay : kRtrSolicitationInterval;
 
-        otLogDebgBr("router solicitation timer scheduled in %u seconds", nextSolicitationDelay);
+        otLogDebgBr("Router solicitation timer scheduled in %u seconds", nextSolicitationDelay);
         mRouterSolicitTimer.Start(Time::SecToMsec(nextSolicitationDelay));
     }
     else
@@ -898,7 +898,7 @@ void RoutingManager::HandleDiscoveredPrefixStaleTimer(Timer &aTimer)
 
 void RoutingManager::HandleDiscoveredPrefixStaleTimer(void)
 {
-    otLogInfoBr("all on-link prefixes are stale");
+    otLogInfoBr("All on-link prefixes are stale");
     StartRouterSolicitationDelay();
 }
 
@@ -928,7 +928,7 @@ void RoutingManager::HandleRouterSolicit(const Ip6::Address &aSrcAddress,
     OT_UNUSED_VARIABLE(aBufferLength);
 
     VerifyOrExit(!mRouterSolicitTimer.IsRunning());
-    otLogInfoBr("received Router Solicitation from %s on interface %u", aSrcAddress.ToString().AsCString(),
+    otLogInfoBr("Received Router Solicitation from %s on interface %u", aSrcAddress.ToString().AsCString(),
                 mInfraIfIndex);
 
     if (!mVicariousRouterSolicitTimer.IsRunning())
@@ -982,7 +982,7 @@ void RoutingManager::HandleRouterAdvertisement(const Ip6::Address &aSrcAddress,
 
     VerifyOrExit(aBufferLength >= sizeof(RouterAdvMessage));
 
-    otLogInfoBr("received Router Advertisement from %s on interface %u", aSrcAddress.ToString().AsCString(),
+    otLogInfoBr("Received Router Advertisement from %s on interface %u", aSrcAddress.ToString().AsCString(),
                 mInfraIfIndex);
 #if OPENTHREAD_CONFIG_REFERENCE_DEVICE_ENABLE
     otDumpCertBr("[BR-CERT] direction=recv | type=RA |", aBuffer, aBufferLength);
@@ -1047,13 +1047,13 @@ bool RoutingManager::UpdateDiscoveredPrefixes(const RouterAdv::PrefixInfoOption
 
     if (!IsValidOnLinkPrefix(aPio, aManagedAddrConfig))
     {
-        otLogInfoBr("ignore invalid on-link prefix in PIO: %s", prefix.ToString().AsCString());
+        otLogInfoBr("Ignore invalid on-link prefix in PIO: %s", prefix.ToString().AsCString());
         ExitNow();
     }
 
     VerifyOrExit(mAdvertisedOnLinkPrefix == nullptr || prefix != *mAdvertisedOnLinkPrefix);
 
-    otLogInfoBr("discovered on-link prefix (%s, %u seconds) from interface %u", prefix.ToString().AsCString(),
+    otLogInfoBr("Discovered on-link prefix (%s, %u seconds) from interface %u", prefix.ToString().AsCString(),
                 aPio.GetValidLifetime(), mInfraIfIndex);
 
     if (aPio.GetValidLifetime() == 0)
@@ -1076,7 +1076,7 @@ bool RoutingManager::UpdateDiscoveredPrefixes(const RouterAdv::RouteInfoOption &
 
     if (!IsValidOmrPrefix(prefix))
     {
-        otLogInfoBr("ignore invalid OMR prefix in RIO: %s", prefix.ToString().AsCString());
+        otLogInfoBr("Ignore invalid OMR prefix in RIO: %s", prefix.ToString().AsCString());
         ExitNow();
     }
 
@@ -1092,7 +1092,7 @@ bool RoutingManager::UpdateDiscoveredPrefixes(const RouterAdv::RouteInfoOption &
     VerifyOrExit(!ContainsPrefix(prefix, mAdvertisedOmrPrefixes, mAdvertisedOmrPrefixNum));
     VerifyOrExit(!NetworkDataContainsOmrPrefix(prefix));
 
-    otLogInfoBr("discovered OMR prefix (%s, %u seconds) from interface %u", prefix.ToString().AsCString(),
+    otLogInfoBr("Discovered OMR prefix (%s, %u seconds) from interface %u", prefix.ToString().AsCString(),
                 aRio.GetRouteLifetime(), mInfraIfIndex);
 
     if (aRio.GetRouteLifetime() == 0)
@@ -1218,7 +1218,7 @@ bool RoutingManager::AddDiscoveredPrefix(const Ip6::Prefix &aPrefix,
         }
         else
         {
-            otLogWarnBr("discovered too many prefixes, ignore new prefix %s", aPrefix.ToString().AsCString());
+            otLogWarnBr("Discovered too many prefixes, ignore new prefix %s", aPrefix.ToString().AsCString());
             ExitNow();
         }
     }