I would not say it has massive impact, plus bolding keywords is a bit of an old school practice, but there is still some benefit / value I believe to using it, although does make content look unsightly if over used.

It's also worth mentioning that this tag **is redundant and has been for many years, you would need to use the following tag Keyword. Be careful to how much you use it and how perfect you make the SEO you do not want to get penalized for over optimisation. **

**Its best to think about this when writing content anyway

Focus content beyond basic keyword density and take into consideration advanced topic modelling - synonyms and close variants; keyword usage and intent; and semantic mark-up

Regards,**

It appears that you do not have “link rel="alternate” for all locations, I'm not sure if that’s going to fix it completely but Google will not understand if you do not associate each alternate version.

It's a good idea to provide a generic URL for geographically unspecified users if you have several alternate URLs targeted at users with the different languages, but in different locales.

E.G each separate domain with a different language should be mentioned.

Also double check language code as incorrect language codes can cause issues. Also make sure you canonical them and add a language specific sitemap. You also want to add a default for example.com is default add the following.

So in the code it would look like this

http://www.internationalseomap.com/hreflang-tags-generator/

http://moz.com/blog/using-the-correct-hreflang-tag-a-new-generator-tool

https://support.google.com/webmasters/answer/189077?hl=en

Hope that makes sense.