Factors affecting the relearning of a langaughe
Time taken to relearn any language depends on many factors such as your previous knowledge in the language, doing full-time learning or part-time learning, and the source of learning the language in your progress. If you are dedicated to learning the language, then you can spend your time all the time when you are practising what you learn.
What’s going to be tough?
Through a growing learning curve, you will learn the language sooner. If you are a native speaker of a language that is not similar to Bangla, then it is going to take a lot of time. For example, if you are a native speaker of any Indian language then you will learn the language faster.
What does FSI have to say?
According to the Foreign Service Institute of State Bangla, the estimated time taken to learn the Bangla language is approximately 44 weeks, that is to achieve general professional proficiency.
Duration of learning German
For relearning the language it might take 20 weeks or more. If you have a native Bangla-speaking friend then you can learn it way faster. If you keep on listening to the Bangla speaker then it might be easier for you to relearn the language.

Best way to improve your spoken skills- Speaking!
Finding a speaking partner from the day one you start learning the language then it is going to take less time when you relearn it. Once you are confident enough and comfortable with the grammatical and phonetic point of view, then you will master the language sooner, as the grammar has similarities to English.
Knowledge of languages closer to Bangla
If you have knowledge of Sanskrit or Hindi grammar, then Bengali will be easier and you can learn faster. Depending on the level of exposure to Bangla and their culture, your ability to pick up a language may take from a couple of weeks to a year.
Learning to speak Bangla should be easier when you learned the language with the correct source. The more time you spend with the native speakers, the more you’ll be able to pick up the language.
What are your options?
Moreover, there are many more sources to relearn the language such as watching Bangla videos on youtube, listening to Bangla news, Game Show, and learning to speak from Books.
