1) how to change the icon of the home 2 located on the right and left of the phone
2) How to change the currency £ in the shop prices in order to passed in euro €
3) what plugin used to ensure that the site is multi-language and currency adpat the shop depending on the language chosen
WPML should work with Appdev theme. Have not tested the theme with other multi-language plugins. Pls check if the following post helps to translate using polylang with page sections –