For this you need to follow the multiLingual feature for magento 2.
Step 1: Inside Magento 2 admin go to Stores –> Configuration –> All store and create new store view for the language(eg:French).
Step 2: Next go to Stores –> Configuration, and now please pay attention on store “scopes”, store view needs to match to language which you want to edit.
Step 3: Now change to desired Country in General -> General -> Desired Country(eg: French, Belgium).
Step 4: Next important thing is Locale, General-> General -> Locale Option you need to select which language store will speak, based on that we will install language pack.
Step 5: Now Install a Language Pack.
Step 6: After you have downloaded language pack, copy it inside Magento app directory, create a new folder i18n, Create Folder named upon vendor, and lastly create folder using store language codes.
Step 7: In this language package, you have to add the text(eg: Hello World) in the csv file which that language package already contains. Also make sure that you in that you print your text in the following format.
<?php echo __('Hello World'); ?>