My team and I have encountered a bug a few times during the creation process of our game which displayed accented letters (the game is in French) as ÃÃÃÃ. Our game is location-based and our devices are set to French. This bug seems to be random as it sometimes happen, sometimes doesn't at the same locations and with the same devices. However, yesterday I was not able to fix this bug. Everytime I entered the game (after having exited the application entirely), the bug was even more important (the ÃÃÃÃ multiplying). Here is a picture:

Is there any way to prevent this from happening? It is really hindering the playability of the game.
Thank you very much,
Joannie