Description
WooCommerce Free Price Labels module lets you change price labels for products with zero price (i.e. free).
You can set different labels by product type:
- Simple and Custom Products.
- Variable Products (and Variations).
- Grouped Products.
- External Products.
And by view:
- Single Product Page.
- Related Products.
- Homepage.
- Pages (e.g. Shortcodes).
- Archives (Product Categories).
Settings
Accessible through:
- WooCommerce > Settings > Booster > Button & Price Labels > Free Price Labels
Tested on 
WooCommerce 4.5.2 and 
WordPress 5.5.1
WooCommerce 4.5.2 and WordPress 5.5.1