While translating CouchSurfing to Czech, I again noticed funny mistake which often repeats in Czech translations of web mails or similar applications.
In English there is "File into folder". Some translators tend to translate this as "File in folder", which changes meaning a bit :-).
I have no idea why this is so popular, but I saw this for first time in Sieve plug-in for Squirellmail and several times since this time.