fix: change language in edit, history and source pages (#2194)

* change language in edit, history and source pages

* fix: remove unnecessary i18n locale switch for download page

Co-authored-by: Nicolas Giard <github@ngpixel.com>

server/controllers/common.js

@@ -59,7 +59,7 @@ router.get(['/a', '/a/*'], (req, res, next) => {
  */
 router.get(['/d', '/d/*'], async (req, res, next) => {
   const pageArgs = pageHelper.parsePath(req.path, { stripExt: true })
-
+  
   const versionId = (req.query.v) ? _.toSafeInteger(req.query.v) : 0
 
   const page = await WIKI.models.pages.getPageFromDb({
@@ -107,6 +107,8 @@ router.get(['/e', '/e/*'], async (req, res, next) => {
     return res.redirect(`/e/${pageArgs.locale}/${pageArgs.path}`)
   }
 
+  req.i18n.changeLanguage(pageArgs.locale)
+
   // -> Set Editor Lang
   _.set(res, 'locals.siteConfig.lang', pageArgs.locale)
   _.set(res, 'locals.siteConfig.rtl', req.i18n.dir() === 'rtl')
@@ -237,6 +239,8 @@ router.get(['/h', '/h/*'], async (req, res, next) => {
   if (WIKI.config.lang.namespacing && !pageArgs.explicitLocale) {
     return res.redirect(`/h/${pageArgs.locale}/${pageArgs.path}`)
   }
+
+  req.i18n.changeLanguage(pageArgs.locale)
 
   _.set(res, 'locals.siteConfig.lang', pageArgs.locale)
   _.set(res, 'locals.siteConfig.rtl', req.i18n.dir() === 'rtl')