[devit]

Written English is by far the best language among the globally popular ones and the European languages because it's easier to learn due to its small alphabet with no special ligature rules, small frequently used vocabulary, and low number of word variants.

Spoken English is not so good due to complex and unintuitive pronunciation, but that's not very relevant nowadays where most media is text (and also, it would be easier to popularize a new pronunciation for English, e.g. pronouncing it as if it were Latin, than a whole new language).

[drran]

Characters are not a problem at all. They can be learned in a week or two. For me, Spanish is much easier to learn - I can read it without a problem, even if I don't know Spanish at all. I can take text of an unknown song in Spanish and then start to sing it immediately. In contrast, I struggle to pronounce English words even today, after 32 years of learning English as programmer. English poetry can damage my brain.

[browsergap]

I think that's good logic about suitability, but it shouldn't mean it's universally the only language that programming languages use. By the same logic, I think an argument could be made for Japanese. Or Korean!