I always thought that this phrase is wrong. That I can use either "the way to do something" or "how to do something". However, I find the phrase way how to very often in various places and that puts me in doubt whether this is correct or not.
Can you think of a proper usage example or are a lot of people just wrong when they use the phrase?
People do say "the way how to", but it's pointlessly redundant. I'd say simply "the way to" or "how to".
Example: "a way how to learn" is technically grammatically correct, but awkward. "How" is an adverb, which is modifying "to learn". So it's valid, just unnecessary.
According to the Czenglish book by Don Sparling, the construct This is the way how to do something is almost a signature phrase of Czech English and it is widely used by anybody from college professors to total beginners. Nevertheless, it is not standard English. The correct thing to say is either This is the way to do something or This is how to do something.
Source and some usage examples: http://nlp.fi.muni.cz/projekty/lexdb/czeng.cgi?direct=264
