How to use Application.LanguageSettings in the xlwings API way

The LanguageSettings member of the Application object in Excel provides access to regional and language settings, which is particularly useful for applications that need to adapt to different locales or determine the language version of Excel in use. This member returns a LanguageSettings object, which can be used to retrieve information such as the language identifiers (LCIDs) for the user interface, help, and installed language packs. In xlwings, this functionality is accessible through the api property, allowing Python scripts to interact with these settings programmatically.

The syntax in xlwings for accessing the LanguageSettings member is straightforward. After establishing a connection to Excel via xlwings.App, you can use the api property to reference the Excel Application object and then access LanguageSettings. For example, app.api.LanguageSettings returns the LanguageSettings object. Key properties include LanguageID, which takes an MsoAppLanguageID constant to specify the language type, such as msoLanguageIDUI for the user interface or msoLanguageIDHelp for help content. These constants are part of the Microsoft Office object model and can be referenced using their numeric values in xlwings if not directly available. For instance, msoLanguageIDUI corresponds to the value 2, and msoLanguageIDHelp corresponds to 3. To retrieve the LCID, you call properties like LanguageID with the appropriate constant. This allows developers to check the current language settings and adjust their code behavior accordingly, such as localizing messages or formatting data based on the user’s locale.

A practical code example in xlwings demonstrates how to use the LanguageSettings member. Start by importing xlwings and creating an instance of the Excel application. Then, access the LanguageSettings object to get language identifiers. For instance, to obtain the LCID for the user interface language, you can use the LanguageID property with the constant for the UI. In xlwings, since constants might not be directly exposed, you can use their known integer values. Here’s a sample script:

import xlwings as xw

# Connect to the active Excel instance or start a new one
app = xw.App(visible=False) # Set to True if you want to see Excel
try:
# Access the LanguageSettings object
lang_settings = app.api.LanguageSettings

# Define constants for language IDs (using example values)
msoLanguageIDUI = 2 # Constant for user interface language
msoLanguageIDHelp = 3 # Constant for help language

# Retrieve LCIDs for different language types
ui_lcid = lang_settings.LanguageID(msoLanguageIDUI)
help_lcid = lang_settings.LanguageID(msoLanguageIDHelp)

print(f"User Interface Language LCID: {ui_lcid}")
print(f"Help Language LCID: {help_lcid}")

# Example: Check if the UI language is English (LCID 1033 for en-US)
if ui_lcid == 1033:
    print("Excel is running with English UI.")
else:
    print(f"Excel UI is in another language with LCID: {ui_lcid}")
finally:
    # Clean up by closing the app
    app.quit()