Posted on

German umlauts

By default, the search ignores German umlauts. Searching for “uber” will also find “über” and so on. This ignorance is not a Relevanssi feature but instead governed by your database. The default database collation WordPress uses (utf8mb4_unicode_ci) ignores all accents, including umlauts.

wp_relevanssi database table, with collation set to utf8mb4_unicode_ci

If you want the search to care about umlauts, you can change the collation. For German, use utf8mb4_german2_ci:

wp_relevanssi database table, with collation set to utf8mb4_german2_ci

Now the database will not ignore umlauts. Relevanssi also removes accents to match what the database is doing, so you must also undo that. Add this to your site:

remove_filter( 'relevanssi_remove_punctuation', 'remove_accents', 9 );

Once you’ve done these steps, rebuild the index. Now the search should not ignore the umlauts.

Leave a Reply

Are you a Relevanssi Premium customer looking for support? Please use the Premium support form.

Your email address will not be published.