Many companies limit the number of languages used internally. There are both positives and negatives of course. The biggest positive though is that it makes it

Many companies limit the number of languages used internally. There are both positives and negatives of course. The biggest positive though is that it makes it easier for programmers to understand code written by other programmers. It also means code written by one programmer will be usable by other programmers. If the code is in a different language then both of those are often false. The 2 programmers don't speak the same language and even if they both happen to understand both languages they can't share code.