Problem concerning WC3 in different languages

[s3rius]

I have experienced apparently random server splits in my map most of the time, but after I did a lot of test rounds with some friends I noticed that it were always those people who do not have a German version of WC3 (whereas me - I usually am the host - and some other testers do have one).
I think I have heard of this problem before, but could not find any information about it anymore.
It usually happens in the 15th or 16th game minute. I have checked all my triggers which are running during this time, but none of them seems to be a logical cause of that.
Now I'm pretty much out of ideas.. maybe one of you guys knows the problem or got an idea what to try.
Thanks for any help.
~s3r

 

[Masiah]

Maybe you should attach the map, so we can check it for ourselves.