Vous avez cherché: for one (Anglais - Latin)

for one year
unus annus

always for one
semper contendunt unum

as the hunt for one
venatio sicut unum

all for one, one for all
parvus numero magnus merito

not for one but for all
non sui sed dei

let us pray for one another
invicem

i have been here for one week.
hic hebdomadem fui.

fight for one's country
litteras disce

if you can hold the sky for one hour
si caelum unam horas tenebis

they have been in brazil for one year.
annum in brasilia fuerunt.

it is sweet and glorious to die for one's family
dulce et decorum est pro patria mori

not for ones self but for all
non sibi sed omnibus

it is better to be a lion for one day than a sheep forever
melius leonem unum diem quam ovem in aeternum esse est

a several tenth deal for one lamb, throughout the seven lambs:
decimam decimae per agnos singulos qui sunt simul septem agn

for one who shall have to die that is sufficient (enough, plenty).
morituro satis

sponte of one's own will; voluntarily; for one's own sake;
sponte

and now send men to joppa, and call for one simon, whose surname is peter:
et nunc mitte viros in ioppen et accersi simonem quendam qui cognominatur petru

for one believeth that he may eat all things: another, who is weak, eateth herbs.
alius enim credit manducare omnia qui autem infirmus est holus manduca

spontanee willingly, of one's own will; voluntarily; for one's own sake;
spontanee