alpha_numeric : /^[a-zäöüßA-ZÄÖÜ0-9]+$/,
```
-Then you need to customize the builtin pattern as explained in the next section. Otherwise Abide will produce an error if a special character is input in your text field which is validated with `pattern="alpha"` or `pattern="alpha_numeric"`.
+Then you need to customize the builtin patterns as explained in the next section. Otherwise Abide will produce an error if a special character is input in your text field which is validated with `pattern="alpha"` or `pattern="alpha_numeric"`.
-Here is the definition of the builtin patterns:
+Here are the definitions of the builtin patterns:
```JS
alpha : /^[a-zA-Z]+$/,