You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "Targe (from Old Franconian *"targa " "shield", Proto-Germanic *"targo " "border") was a general word for shield in late Old English, its diminutive, "target", came to mean an object to be aimed at in the 18th century, Frankish,  Old Franconian or Old Frankish was the West Germanic language spoken by the Franks between which type span?" whose answer is 4th and 8th century.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Frankish language time span
Useful Output:

Doc 1: The Frankish language was already fading in much of his empire, as the Franks adapted to the languages of those they ruled.
Doc 2: At around the 5th century, the Franks probably spoke a range of related dialects and languages rather than a single uniform dialect or language.
Doc 3: The crucial early period of this contact occurred in the 7th and 8th centuries and resulted from the expansion of Frankish (Merovingian and early Carolingian)
Doc 4: The original language was a West Germanic dialect, different from both Gothic, or East Germanic, and Old Norse, or North Germanic (James, 31).
Doc 5: or Old Frankish, was the West Germanic language spoken by the Franks from the 5th to 9th century. After the Salian Franks settled in Roman Gaul (roughly