Is an interesting question. I have some friends from East Europe living in Spain. They typically learn how to navigate the language surprisingly fast. They even laugh at us about this.

The reason is that their native Eastern Europe languages are very complicated to read and speak by nature; vowels are scarcely used, you need a finely trained ear to discern some special whispered sounds, is not always easy to recognize a word by its shape...

For this people customed to use every day words with "two vowels hidden in twelve characters", speaking spanish is practically a childsplay.