People in Southeast Asia speak little to no English. Even in the Philippines and Malaysia that are thought to be English speaking countries. In reality - no. Philippines and Malaysia do speak and understand English generally better than their neighbours. However, it’s on the surface - they won’t understand and won’t use common idioms, they’ll make grammar mistakes of which they’re unaware because they do and everyone speaks that way in their countries, and the level of their English is basic.
In some countries people may speak more, in some less. Some people may understand and know basic words and phrases.
In general, it’s easier not to bother making your English correct if you’re not a native English speaker, nobody will care anyway about you speaking correctly and won’t be able distinguish between correct and incorrect. And also accept that misunderstanding will take place in the majority of the situations.
They often use the present simple time whether they’re talking about present, past or future. “Yesterday I go to store”.
They don’t use “a” and “the”.