In my opinion writing when you are learning a new language is essential. It helps you memorize things easier and overall helps you retain the information longer. Besides, if you are already taking the time and putting in the work into learning a new language, you might as well embrace all it's aspects (grammar, speaking, reading, writing, spelling etc.). I come from a biracial family so I have 2 native tongues, Spanish and English. I'm currently learning a third language; French. Something that really helps me remember new vocabulary is creating mnemonic devices. Now, Spanish and French are both Romance tongues so I find a lot of words in Spanish that help me remember the words in French. Even though English is a Germanic tongue, I have been able to find words in English that help remember the new vocabulary in French.