whether advertisements are suspected of breaking the law is usually defined by laws and regulatory agencies, and the laws and regulations of different countries and regions may be different. Generally speaking, however, advertisements may be suspected of violating the law under the following circumstances:

False advertisements: advertisements containing false information, such as false product statements, false price or effect promises, may be regarded as illegal.

insulting or discriminatory advertisements: advertisements containing insulting, discriminatory, offensive remarks or images may be considered illegal because they may cause social dissatisfaction or legal problems.

deceptive advertisements: the information in advertisements may mislead consumers, for example, by misleading pictures or words, making consumers make wrong purchase decisions.

unauthorized use of intellectual property rights: the use of unauthorized trademarks, patents or copyrights in advertisements may infringe intellectual property rights, which is also illegal.

false certification or endorsement: if an advertisement claims to have received false approval, endorsement or authentication, it may be considered illegal.

false statement: the product in the advertisement claims to have the efficacy that has not been scientifically proved, or there is not enough scientific basis to publicize the health effect of the product, which may be considered illegal.

invasion of privacy: advertisements may invade personal privacy, such as unauthorized collection or release of personal information.

As for which words cannot be used in advertising language, it is usually restricted by national and regional laws and regulations. Generally speaking, the following types of words or expressions may be restricted:

false or exaggerated propaganda: exaggerated facts or false propaganda words cannot be used.

medical and health field: in the medical and health field, advertisements may be subject to special supervision, and unapproved medical statements cannot be used.

discriminatory words: insulting, discriminatory or offensive words are not allowed.

invasion of privacy: advertisements cannot violate personal privacy or data protection regulations.

unauthorized brand: unauthorized trademarks or brand names cannot be used.

the most important thing is to abide by the advertising laws and regulations of the country or region where you are located, so as to ensure that the advertisements are legal and compliant. If you have any doubts, it is recommended to consult a legal professional or advertising legal adviser for detailed guidance.