Conga Composer pulls the user's Locale field from the User object. This value then governs the user's interaction with Composer, which affects Numeric and Date Time field formatting, as well as picklist values for master object field values. For Conga Queries, the person writing the SOQL is responsible for adding the ToLabel() function around picklist field names.
You can override the user's culture with
&Culture (for numbers AND dates) or
&CurrencyCulture (for currency numbers only).
Primarily used for international scenarios, these parameters affect the appearance of number and date values in Microsoft Word templates.
These options override default data formatting options and are generally not necessary for most users.