Comment 2 for bug 1674171

With a new version of our test server (2.12.4) we tried to localize the server environment to Czech (we used English environment until recently). It seems that the problem has been solved by server environment localization. So far we didn´t came across any evidence that the Czech environment would have a negative impact on any other Evergreen feature or the English localization.
I would recommend to add piece of information to the documentation about Evergreen installation, that for some languages it necessary to use localized server environment to prevent crashes of some parts of Evergreen interfaces.
I'm not sure which particular languages are relevant for this - definitely the languages with extended ASCII characters (probably the Czech is one the worst when it comes to extended ASCII).

The same solution applies as well to the related bugs:
bug 997284 and the bug 1365581.