Specify the abbreviations or letter combinations that you do not want LibreOffice to correct automatically.
The exceptions that you define depend on the current language setting. If you want, you can change the language setting by selecting a different language in the Replacements and exceptions for language box.
Replacements and exceptions for language:
Select the language for which you want to create or edit the replacement rules. LibreOffice first searches for exceptions that are defined for the language at the current cursor position in the document, and then searches the remaining languages.
Abbreviations (no subsequent capital)
Type an abbreviation followed by a period, and then click New. This prevents LibreOffice from automatically capitalizing the first letter of the word that comes after the period at the end of the abbreviation.
Lists the abbreviations that are not automatically corrected. To remove an item from the list, select the item, and then click Delete.
Words with TWo INitial CApitals
Type the word or abbreviation that starts with two capital letters that you do not want LibreOffice to change to one initial capital. For example, enter PC to prevent LibreOffice from changing PC to Pc.
Lists the words or abbreviations that start with two initial capitals that are not automatically corrected. All words which start with two capital letters are listed in the field. To remove an item from the list, select the item, and then click Delete.
Adds the current entry to the list of exceptions.
Automatically adds abbreviations or words that start with two capital letters to the corresponding list of exceptions. This feature only works if the Correct TWo INitial CApitals option or the Capitalize first letter of every sentence option are selected in the [T] column onOptions tab of this dialog.