"I do not eat turtles."
Translation:Jeg spiser ikke skilpadder.
There are different rules for regular nouns and personal pronouns in this case.
"Ikke" comes before regular nouns, but with personal pronouns you have the option of placing it either before or after. Beware that this can alter the meaning of the sentence:
Jeg elsker ikke henne = I do not love HER (but someone else)
Jeg elsker henne ikke = I do not love her (neutral) -or- I do not LOVE her (but like her a lot)