"I want to be able to determine the right English to use depending on the situation at hand."
- "I want to be able to determine the right English to use depending on the situation at hand."
"I want to be able to ~" 「〜ようになりたい」
"to determine ~" 「〜を使い分ける」
"to determine the right English" 「正しい英語を使い分ける」
"depending on the situation at hand" 「その場に応じた」