I have been trying to localize my game and noticed that during the teleportation to another place in the same universe, the texts on the TeleportGui are not localised.
More specifically for my case, before teleportation, a random text is generated and a tween is played, which is localised correctly until the player is being teleported. During that more or less short amount of time, the text gets back to the original one, and once the teleportation finishes, the text gets localized again.
Video of the issue:
Game where it is happening (use French locale and play any game mode to be teleported): SAKTK Test Servers - Roblox
Creating a repro is kind of painful because it requires two separate place files and they also need to be published for teleport operations to work which makes a repro hard to create. I hope I provided enough information nevertheless.