[sloaken]

No you do not have to be fluent. Reading English is more important than writing English, writing English s more important than speaking English.

You will most likely need to read some technical information in English.

You will probably need to write a question in English to solicit help.

You might find a job working with others who do not speak your language.

Having said that, I have seen where English is considered a 'Common' language. The tourism industry seems to have this requirement.

I know a couple, one person is German and the other is French. They live in France. Neither spoke (past tense as they do more so now) the other language. At a party someone asked how they communicated with each other. "English" of course, the common language. The German is able to work in France because of her ability to speak English enables her to communicate with co-workers.