Is the Liturgy of Hours in Latin or English? and there is an edition which recommended and/or approved by the Vatican? How much it costs usually?
And about the Christian Prayer - I never heard about that book. I will search about it right now. Thanks!
There is a Latin version available from the Midwest Theological Forum:
https://www.theologicalforum.org/Category/105/Product/420/Liturgia_Horarum_Hardcover_Edition_
But very pricey. Christian Prayer is a one-volume abridged but approved version of the Liturgy of the Hours in English, omitting the Office of Readings, and with simplified mid-day prayer.
There are also Latin partial versions noted for chant: Antiphonale Romanum volumes I and II includes all Sundays during the year, as well as all feasts and solemnities. Les Heures Gregoriennes is a Latin/French antiphonary for all day hours of the year (no Office of Readings). It’s unofficial but licit; it’s specific to the use of the Communauté St. Martin in France.
You asked in your earlier post for something equivalent to the Book of Common Prayer. I don’t know of any Catholic equivalent in one volume. The BCP includes the Anglican missal, and the equivalent to the Liturgy of the Hours (morning prayer and evensong). The Catholic Liturgy of the Hours is more developed than the Anglican equivalent. Hence to be “equivalent” you need the Liturgy of the Hours and a missal. Not an altar missal (as used by priests and bishops) but a missal for the faithful.
With both a missal and the Liturgy of the Hours you will be fully equipped for
official Catholic prayer/liturgy.
For popular devotions, others can point you in the right direction, but for things like the Rosary and the “standard” prayers (e.g. Pater Noster and Ave Maria), you can find those online.
NB: I see you are in Israel, I am not sure which English translation applies there. There are basically two English versions, Divine Office for the UK and other countries, and Liturgy of the Hours for the US and English-speaking Canada. Someone here might know which applies. Both are essentially the same, but the translations differ.