Hi, the amp pages shou be translated from http://www.example.com/amp
" rel="nofollow" target="_blank to fr.example.com/amp
And the amp validator shows errors for the last line your translation engine add.https://goo.gl/d4Zlpu
And this is the amp validator from Google amp project https://validator.ampproject.org/
You can put any amp translated pages html here and you'll find the last line you add shows error.