diff --git a/src/messages/ui.cy.json b/src/messages/ui.cy.json
index 40ff51718..51c51c778 100644
--- a/src/messages/ui.cy.json
+++ b/src/messages/ui.cy.json
@@ -4,7 +4,7 @@
   "about.microbitHeartImageAlt": "Bwrdd micro:bit gyda'r grid LED 5 wrth 5 yn dangos calon",
   "actions.close": "Cau",
   "actions.cancel": "Canslo",
-  "actions.reconnect": "Reconnect",
+  "actions.reconnect": "Ailgysylltu",
   "alert.data.classNameLengthAlert": "Ni all enwau gweithredoedd fod yn hirach na {maxLen} nod.",
   "alert.recording.disconnectedDuringRecording": "Datgysylltodd y micro:bit wrth recordio",
   "alert.isRecording": "Rydych chi'n recordio ar hyn o bryd!",
@@ -115,9 +115,9 @@
   "connectMB.usbTryAgain.replugMicrobit2": "Gwnewch y canlynol:",
   "connectMB.usbTryAgain.replugMicrobit3": "gwiriwch nad oes gan y micro:bit hwn becyn batri wedi'i gysylltu",
   "connectMB.usbTryAgain.replugMicrobit4": "dad-blygiwch ac ail-blygiwch y cebl USB",
-  "connectMB.unsupportedMicrobit.header": "micro:bit V1 is not supported for connecting two micro:bits",
-  "connectMB.unsupportedMicrobit.explain": "Unfortunately, we only support using micro:bit V2 when connecting two micro:bits. You have connected a <link>micro:bit V1</link>.",
-  "connectMB.unsupportedMicrobit.advice": "If your computer supports Web Bluetooth then you can use the <link1>alternative method</link1> that uses one micro:bit with your <link2>micro:bit V1</link2>.",
+  "connectMB.unsupportedMicrobit.header": "Ni chefnogir micro:bit V1 ar gyfer cysylltu dau micro:bit",
+  "connectMB.unsupportedMicrobit.explain": "Yn anffodus, rydym ond yn cefnogi defnyddio micro:bit V2 wrth gysylltu dau micro:bit. Rydych chi wedi cysylltu  <link>micro:bit V1</link>.",
+  "connectMB.unsupportedMicrobit.advice": "Os yw'ch cyfrifiadur yn cefnogi Web Bluetooth yna gallwch ddefnyddio'r <link1>dull amgen</link1> sy'n defnyddio un micro:bit gyda'ch <link2>micro:bit V1</link2>.",
   "connectMB.radioStart.heading": "Beth fydd ei angen arnoch i ddechrau:",
   "connectMB.radioStart.requirements1": "2 micro:bit",
   "connectMB.radioStart.requirements2": "Cyfrifiadur",
@@ -170,17 +170,17 @@
   "connectMB.connecting": "Wrthi'n cysylltu…",
   "connectMB.reconnecting": "Wrthi'n ailgysylltu…",
   "connectMB.bluetooth.invalidPattern": "Mae'r patrwm rydych chi wedi'i lunio yn annilys.",
-  "connectFailed.bluetoothHeading": "Failed to connect to micro:bit",
-  "connectFailed.bluetooth1": "The connection to the micro:bit could not be established.",
+  "connectFailed.bluetoothHeading": "Wedi methu â chysylltu â micro:bit",
+  "connectFailed.bluetooth1": "Nid oedd modd sefydlu'r cysylltiad â'r micro:bit.",
   "reconnectFailed.radioHeading": "Wedi methu ag ailgysylltu â'r micro:bits",
   "reconnectFailed.bluetoothHeading": "Wedi methu ag ailgysylltu â'r micro:bit",
   "reconnectFailed.bluetooth1": "Nid oedd modd ailsefydlu'r cysylltiad â'r micro:bit.",
-  "connectFailed.remoteHeading": "Failed to connect to micro:bit 1",
-  "connectFailed.remote1": "The connection to the micro:bit you are wearing could not be established.",
+  "connectFailed.remoteHeading": "Wedi methu â chysylltu â micro:bit 1",
+  "connectFailed.remote1": "Nid oedd modd sefydlu'r cysylltiad â'r micro:bit rydych chi'n ei wisgo.",
   "reconnectFailed.remoteHeading": "Wedi methu ag ailgysylltu â micro:bit 1",
   "reconnectFailed.remote1": "Nid oedd modd ailsefydlu'r cysylltiad â'r micro:bit rydych chi'n ei wisgo.",
-  "connectFailed.bridgeHeading": "Failed to connect to micro:bit 2",
-  "connectFailed.bridge1": "The connection to the micro:bit connected to your computer could not be established.",
+  "connectFailed.bridgeHeading": "Wedi methu â chysylltu â micro:bit 2",
+  "connectFailed.bridge1": "Nid oedd modd sefydlu'r cysylltiad â'r micro:bit sydd wedi'i gysylltu â'ch cyfrifiadur.",
   "reconnectFailed.bridgeHeading": "Wedi methu ag ailgysylltu â micro:bit 2",
   "reconnectFailed.bridge1": "Nid oedd modd ailsefydlu'r cysylltiad â'r micro:bit sydd wedi'i gysylltu â'ch cyfrifiadur.",
   "reconnectFailed.subtitle": "Dilynwch y cyfarwyddiadau hyn i ailgychwyn y broses gysylltu.",