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Last updated on Aug 24, 2026
When visiting the Language Settings tab within the Settings section of the application, you can:
To add a new Language, click the “Add a Language” text in the Language Settings area. A form opens where you name the custom Language, then select a language, such as Japanese, and a country or region, such as Japan.
Click Add a Language to create a new locale and set of translations
Below is an overview of each of the fields available per Language:
es-MX, or Spanish - Base for an es Language with no country or region selected.
When creating a locale, set the name, language, and optionally the country/region
You can't create Languages with duplicate locales. For example, if you already have a Language with a locale set as “es-MX”, you cannot create a second “Spanish” with “Spanish/Castilian” and “Mexico” as the Country/Region.
You may, however, have multiple Languages configured for the same base language with different regions selected. For the above example, it is possible to select another “Spanish/Castilian” language and set “Spain” as the Country/Region for a locale of “es-ES”.
Similarly, you could also create a base Spanish translation by creating a “Spanish - Base” with a language of “Spanish/Castilian” but without any country/region set. For why a base Language is useful, see the Understand How Languages Apply to Invoices help article.
By customizing a Language, you supply overrides that replace the default English labels on invoices and credit notes, for customers meeting at least one of these conditions:
Selecting Customize Language to modify an existing Language's translations
A full discussion on this topic is below in the Language Application section.
For which words on an invoice can be customized and where each one appears, see the Customize Invoice and Credit Note Text help article.
If you’d like to change details about an existing Language – particularly the name, language, or region for the existing Language Locale – you can select “Configure Language”.
Remember the constraint from Add a new Language: you can't duplicate an existing locale.
Selecting Configure Language to modify an existing Language's locale details
Your primary Language is the set of translations your invoices and credit notes fall back to when no Language Locale matches the customer's locale, or when the customer has no locale at all. A new customer signing up without a locale inherits the primary Language's translations.
Selecting Set as Primary to make this Language the site's primary
WARNING: Deleting a Language is permanent and can't be undone. If the Language is in use, its customers immediately fall back to the next level of the translation hierarchy, which changes what they see on their invoices.
Before deleting a Language that customers are using, Advanced Billing tells you how many customers are affected and which language they'll fall back to. It reports a count rather than naming the individual customers.
When you go to delete a set of translations, you may see 3 different sets of dialog:
Deleting unused translations reports that it is safe
Deleting the primary translations warns that all customers are affected
Deleting in-use translations reports how many customers are affected and their new fallback language
None of these warnings block the deletion, so read them before confirming.
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