I am the World's Strongest, because I can read MANGA is a Manga/Manhwa/Manhua in (English/Raw) language, SUGGESTIVE
series, english chapters have been translated and you can read them here. You are reading I am the World's Strongest, because I can read MANGA chapters on ManhwaZ, fastest updating comic site. The Summary is
The other world I reincarnated to, was a world that will enable you to use magic after reading a Grimoire. And the Grimoire’s contents areーーYou wouldn’t believe it, it’s「Manga」. This world’s people would take around one year to read one Grimoire(Manga) But for me, it is a「Manga」, that’s why it would not take an hour. Interpreting and understanding all kinds of Grimoires and the 6 year old me who became the World’s Strongest Master Mage, Welcomed brides that were also 6 years old, and started living a carefree life……!!