7 words/phrases which are incorrect in common English usage

1. Ciabattas - The plural is Ciabatte
2. Aquariums - The Latin plural is Aquaria
3. Salsa sauce - Salsa is Spanish for sauce
4. A piece of data - Data is the plural form of datum
5. 1 Pinini, 2 Pininis - Pinini is already the plural form, with Pinino the singular
6. Agendas - As agenda is Latin for 'Things to be done' you cannot pluralize it
7. Rhinoceri/Rhinoceruses - The Latin plural is Rhinocerontes