The last time I spoke with my father oin the target language., The last time I spoke with my father in the target language,

It's probably more natural to just say what the language is (I'm assuming it's English).

because I have amy goal is to speak more clearly and my father has a's goal is to understand thmore word.s, because my goal is to speak more clearly and my father's goal is to understand more words,

Wwe spoke about family, our country, and our habits. we spoke about family, our country, and our habits.

My father learnst some new words but I could not correctly express and correctly convey thenvey certain ideas to my father, so I repeated some words again. My father learnt some new words but I could not correctly express and convey certain ideas to my father, so I repeated some words again.

Because the learning and the repeating were in the past, you need to use the past tense.

I think Iit was my fault due to I didas I haven't practice befored with others before. I think it was my fault as I haven't practiced with others before.

MWe mostly we spoke about our family, I and I was able to described everyone, although I noticed that I had lessmy vocabulary about itwasn't as good here. We mostly spoke about our family and I was able to describe everyone, although I noticed that my vocabulary wasn't as good here.