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If by "most speakers" you mean arithmetically, then the top-3 languages are: Chinese, Spanish and English.
If on the other hand you mean in terms of geographic spread, then it should be English, Spanish and Arabic.
I hope it helps.
Every language has its own good speakers. As English is about an International language so English has most speakers. After English, Arabic ,chinese and Hindi languages has most speakers.
the languages have the most speak are English & Arabic