Practising and understanding.
WHERE IT HELPS
Explaining grammar when you did not follow the textbook Conversation practice, at any hour Correcting your writing Explaining why something is wrong Vocabulary in context
FOR CONVERSATION PRACTICE
"Have a conversation with me in [language] at beginner level. Correct my mistakes after each message."
Genuinely useful, particularly where finding a practice partner is difficult.
FOR CORRECTION
"Correct this and explain each correction."
The explanation matters more than the correction.
WHAT IT DOES BADLY
Pronunciation, which it cannot hear unless the tool supports speech Regional variation and register Languages with limited training data
FOR NIGERIAN LANGUAGES
Support varies considerably. Widely spoken languages have better coverage than others.
Test before relying on it, and verify with a speaker.
WHAT IT CANNOT REPLACE
Speaking with people. Language is social.
WHAT TO VERIFY
Anything you will use in a real situation, with a native speaker.