[Bug]: Language Switcher on main pages doesn't work ?_locale=xx

[capitalfuse]

Expected behavior

ex)
When change language from English to German on the main page;
Links shows the following ---> 'https://demo.pimcore.com/?_locale=de'
and not changed to the German site.

The following code has the main reason.
src/Twig/Extension/LanguageSwitcherExtension.php

Actual behavior

It should be the following;
'https://demo.pimcore.com/de'

Steps to reproduce

Commented out the following codes, fixed, but it will affect the links of news document detail pages.
src/Twig/Extension/LanguageSwitcherExtension.php

$route = $request->get('_route');
            $routeParams = $request->get('_route_params');

            if ($route && $routeParams) {
                $routeParams['_locale'] = \Locale::getPrimaryLanguage($language);
                $route = $this->urlGenerator->generate($route, $routeParams);
                $target = $route;
            }

[kingjia90]

Thank you! Likely is a regression from #435

[capitalfuse]

I changed if condition like below.

if ($route && $routeParams['newstitle'] ) {
                $routeParams['_locale'] = \Locale::getPrimaryLanguage($language);
                $route = $this->urlGenerator->generate($route, $routeParams);
                $target = $route;
            }

---> But the above method has not been applied for the page view.

[robertSt7]

It only works for static routes at the moment

[dvesh3]

Fixed by #524