What if I want to use own pretrained fasttext model (or even commoncrawl model instead of standard wiki one)? E.g. look what they publish now: https://fasttext.cc/docs/en/crawl-vectors.html.
Current FastText impl

    url_base = 'https://s3-us-west-1.amazonaws.com/fasttext-vectors/wiki.{}.vec'
    aligned_url_base = 'https://s3.amazonaws.com/arrival/embeddings/wiki.multi.{}.vec'

    def __init__(self, language="en", aligned=False, **kwargs):
        if aligned:
            url = self.aligned_url_base.format(language)
        else:
url = self.url_base.format(language)

doesn't allow you to do such basic stuff.