Ugh, I worked in a code base that had a lot of Cyrillic characters and the code base got moved to our (English language) team. It was difficult to work out what

Ugh, I worked in a code base that had a lot of Cyrillic characters and the code base got moved to our (English language) team. It was difficult to work out what was going on and with a lot of Google translate we ended up with an English code base. Another interesting thing that happened once was that a German team had a comment with an umlaut in it that would crash certain code/text editors. It took them a long time to figure out what was happening.