This thread is resolved. Here is a description of the problem and solution.
Problem:
The client is planning to create an introductory page where site visitors can choose either English or German, and then be redirected to the respective language version of the site. They are also concerned about whether this setup will affect the SEO of their multilingual website.
Solution:
We recommend using the built-in features of WPML for language redirection, so there is no need to purchase an additional plugin. You can set up a language directory by following the instructions here: Setting up a language directory.
Additionally, we confirm that using WPML for this purpose will not negatively impact your website's SEO.
Please note that this solution might be irrelevant if it's outdated or not applicable to your specific case. We highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If you still encounter issues, please open a new support ticket at WPML support forum.
This is the technical support forum for WPML - the multilingual WordPress plugin.
Everyone can read, but only WPML clients can post here. WPML team is replying on the forum 6 days per week, 22 hours per day.
This topic is split from https://wpml.org/forums/topic/faq-english-to-german-translation-issue/