Add spaces: InBerlin,thebrotherssharedherlife'sworkbegantoestablisha"GermanDictionary",whichshouldcapturethevocabularyoftheGermanlanguagefrom400yearsago,inalphabeticalordertounderstandandexplaintoeveryone.

Answer: In Berlin, the brothers shared her life's work began to establish a "German Dictionary", which should capture the vocabulary of the German language from 400 years ago, in alphabetical order to understand and explain to everyone.

Add spaces: Afterthiswork,IhavetakenapositiononwhatIthinkandIthinkitisuptoeachindividualtochoosewhethertogothroughagenetherapytreatment.

Answer: After this work, I have taken a position on what I think and I think it is up to each individual to choose whether to go through a gene therapy treatment.

Add spaces: AmericansgetfarmoreseleniumthroughtheirdietthanBritishpeoplebecausetheAmericansoilisricherinthismineral.

Answer:
Americans get far more selenium through their diet than British people because the American soil is richer in this mineral.