Please check your_____ (spell)mistakes. A detailed explanation of the question is helpful for the respondent to give an accurate answer

Please check your_____ (spell)mistakes. A detailed explanation of the question is helpful for the respondent to give an accurate answer

spelling
Speaking mistakes as an object of gerund phrase

Please tell me what your name is

Please tell me what your name is. Tell me what your name is. Tell me what your name is. Ask: what your name is is a complement? Why? Answer: it is a supplementary statement "please tell me..." Question: is it a complement answer: Yes question: is it both a complement and an object? Answer: is it an object clause

Is what your name is a complement in please tell me what your name is?

No
What your name is is the object clause and the direct object of the sentence;
Me is the indirect object of a sentence

Can you tell me what is your favorite sport?
What your favorite sport is

All right

English "what else? Can you tell me?"

Is there anything else? Can you tell me?

You, what, do, can, tell, next, me, to (?)

Can you tell me what to do next?
Can you tell me what to do next?

You, had, tell, lunch, can, for, what, you, me (?)
2.like,why,me,treat,do,always,you,that（?）
3.pen,some,me,friends,introduced,he,of,to,his（.）
4.afraid,friends,anyone,the,with,boy,make,to,is（.）
5.the,myself,place,l,new,feel,don‘t,of,sure,in,work（.）

You, had, tell, lunch, can, for, what, you, me (?) can you tell me what you had for your lunch? 2. Like, why, me, treat, do, always, you, that (?) why do you always treat me like that? 3. Pen, some, me, friends, I

He, looks, what, let, tell, me, you, like

Tell me your name polite request question_____ tell me your name?

I'm glad to be able to answer your question here,
（Would you please ) tell me your name?
Can you tell me your name, please?

Can you tell me your name be changed to can you tell me your name

Yes, could is more polite. Can is more casual. I suggest using could, because it's your first time to talk with a stranger. But your sentence pattern is wrong, and there is one less leading word. Leading object clauses should be could you tell me what your name? And can you tell what me your name?