Comment by johannes1234321

It is a tough one and yes, here in Germany I would expect far most developers to understand enough English to use English tools and documentation. (Exceptions exist, notably with old technology like Mainframes)

In other countries like Russia or Japan I noticed, as an outside observer, more reliance on translations.

When translating a complication is the degree to which one does it. There are terms which can be translated and some where it becomes weird. In some parallel comment "pull request" was mentioned. Translating that certainly becomes weird, but translating "file" as "Datei" is well established and - when translating - expected.