Speaking a language is always much harder than reading or writing it. If you want, I can let you know the correct way of saying something - for instance, "My English not good" > "My English is not good"
And to be fair, I will then try a statement in Thai, so that you get to correct me :)
I will try to say, my Thai is really bad. ไทยฉันไม่ดีจริง ๆ
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