No. You don't need "fault" to file for divorce in Louisiana.
A "no-fault" divorce requires spouses to live separate and apart for a specific amount of time.
The amount of time is 180 days, 365 days or two years.
Spouses in a covenant marriage must live separate and apart for two years. Most people are not in a covenant marriage.
For spouses not in a covenant marriage, the separation time depends on whether the spouses have minor children born during the marriage or adopted during the marriage. Spouses with minor children of the marriage have to live separate and apart for 365 days. Spouses without children, or with adult children, have to live apart 180 days.
But if you want to, you can ask a court to give you a divorce based on the "fault" of your spouse.
The grounds for divorce on "fault" include a felony conviction, adultery, and domestic abuse under certain circumstances.
Adultery is difficult to prove. To get an adultery divorce, a spouse must prove the time, place, and person with whom the adultery occurred. The adulterous spouse's admission or confession is not enough for an adultery divorce. The other party's testimony is not enough, either. Video or photo evidence of the adultery has to be admissible under the rules of evidence. So, it is uncommon for a self-represented litigant to try to get an adultery divorce.
Domestic abuse during the marriage supports a fault-based divorce. Also, if a protective order has been entered during the marriage, after a hearing, against one spouse to protect the other spouse or a child of either spouse, the court should grant a fault-based divorce.