It started from a wiki site for Middle English describing frog that had since been taken down. Middle English was basically old English from from c. 1150 to c. 1470.
A frogge biþ a smal beaste wiþ foure leggys, whyche liueþ booþ in watyre and on londe. It is broune or grene or yelowe, or be it tropyckal, he may haue dyuers coloures. It haþ longys and guilles booþe. It haccheþ from an ey and it þan ys a tadpolle. It groweþ to ben a frogge, if it þan ne be noght eten.
A frog is a small beast with four legs, which lives both in water and on land. It is brown, green, yellow, or, be it tropical, it may have diverse colours. It has both lungs and gills. It hatches from an egg, and it then is a tadpole. It grows to be a frog, if it is not eaten.
Longer version
A frogge biþ a smol beaste wiþ foure leggys, whyche liueþ booþ in le watyre and on londe. It is broune or grene or yelowe; or be it tropyckal, he may eben haue dyuers coloures, and liue in treys. It haþ longys and guilles booþe. Frogge need þe watyre to reeprudus. Eet haccheþ from an ey and it þan ete ys a tadpolle. It groweþ to þon a frogge, if it þan ne be nought eten.
It ets smal bogs like cricets, fliys, ir evn wurms. þey haþ tung þat ben long and stikey. þere are pisoinis frogges out þre. Yuv migt se a frogge of yu eentr þe forets, or þe laeks. A frogge biþ founde in al contynens ecsept Antartika.
A frogge biþ broþers wiþ a toade. Toades aren froggen wiþ drye þicke sken.
A frog is a small creature with four legs, which lives both in water and on land. It is brown or green or yellow; or, if it is tropical, it may be different colors, and live in trees. It has both lungs and gills. Frogs need water to reproduce. It hatches from an egg and it then it is a tadpole. It then grows into a frog, if it is not eaten.
It eats small bugs like crickets, flies, or even worms. They have a tongue that is long and sticky. There are poisonous frogs out there. You might see a frog if you enter the forests, or the lakes. The frog is found on all continents except Antarctica.
A frog is brothers with a toad. Toads are frogs with a dry, thick skin.