Can I read a dua like dua tawasul or kumayl without having wadhu?

And can I read a dua and quran in english? Do I get the same sawab ?

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Yes you can recite Du’a and Holy Quran without wudhu but make sure not to touch the letters of Quran and as an obligatory precaution the names of 14 Masoomins (a.s) too.
Yes you can read Dua and Quran in any language but if it’s transliteration and not translation dont touch it too without Wudhu.