English's Closest Relatives

 Test yourself how well you can read a familiar text in Scots, West Frisian, and Low German. Can You Understand English's Closest Relatives? The Lord's Prayer is often used for such examples, as readers are familiar with it. Heh. Used to be, anyway. I would add Old English 

 Fæder ure þu þe eart on heofonum, si þin nama gehalgod. to becume þin rice, gewurþe ðin willa, on eorðan swa swa on heofonum. urne gedæghwamlican hlaf syle us todæg, and forgyf us ure gyltas, swa swa we forgyfað urum gyltendum. and ne gelæd þu us on costnunge, ac alys us of yfele soþlice.

And Middle English to the quiz for comparison, 

 Oure fadir þat art in heuenes halwid be þi name; þi reume or kyngdom come to be. Be þi wille don in herþe as it is dounin heuene. yeue to us today oure eche dayes bred. And foryeue to us oure dettis þat is oure synnys as we foryeuen to oure dettouris şat is to men þat han synned in us. And lede us not into temptacion but delyuere us from euyl.

For Old English (Anglo-Saxon) and Middle English both, it will help if you know that the "þ" is a thorn, "ð" is a eth, and both are pronounced "th," as in thee/thine. For Middle English, "u" is sometimes pronounced v, and "y" is sometimes pronounced hard g.