> but do not consider reasonable to pay any learning effort for other languages
One problem is that English is the language majority of technology is created in, and it has developed agreed-on terms for a lot of things. Everyone calls their tabs "tabs" in English, but when it comes to translating, every other app uses a different word. Even if names are consistent within the app, they are inconsistent between each other. This leads to a lot of problems if say, an app reports an error that's related to some OS thing, and calls it with a different translated name than the OS translation does.
EDIT: And I'm not making this up. I worked on a localized Ubuntu for a very short while before switching back to English because messages I got in my command line were painfully inconsistent with each other and with agreed-upon proper translations in my language.
One problem is that English is the language majority of technology is created in, and it has developed agreed-on terms for a lot of things. Everyone calls their tabs "tabs" in English, but when it comes to translating, every other app uses a different word. Even if names are consistent within the app, they are inconsistent between each other. This leads to a lot of problems if say, an app reports an error that's related to some OS thing, and calls it with a different translated name than the OS translation does.
EDIT: And I'm not making this up. I worked on a localized Ubuntu for a very short while before switching back to English because messages I got in my command line were painfully inconsistent with each other and with agreed-upon proper translations in my language.