I wonder if the same experience can be applied to other languages. That's because in the experiment the subjects were learning another language with completely

I wonder if the same experience can be applied to other languages. That's because in the experiment the subjects were learning another language with completely different alphabet from English. The study was done, I assume, in US since the university is located there. It for sure will apply when learning Mandarin or Katakana. But will it apply when learning a language from same language family like Dutch? From my personal experience if the alphabet is known for you then there is no need to write by hand. Typing could be even more efficient if you're typing fast. That makes it easy to quickly go through a lot of excercises for writing. And fast reading and reading a lot are another important factors to the success.