You'll want to also make sure to translate your image alt tags, and only Google uses rel=canonical, so you might be better off using the “content-language” meta tag for all of the other engines you're targeting. Baidu and Bing use the meta tag instead. FYI. This is the best guide I've seen on hreflang tags yet: https://yoast.com/hreflang-ultimate-guide and I use this hreflang testing tool frequently: http://flang.dejanseo.com.au/