Latin is the universal mass language, though services are also held in the language native to the location of service.
in a church
"Mass" is a church service ... not a sacrament.
The Mass is the central service of the Catholic Church. Nearly all services, such as weddings and funerals, are incorporated into a Mass.
Mass
You must be referring to a Catholic funeral where a brief rite is held at the door of the church when the priest receives the casket containing the deceased at the beginning of a funeral Mass. He then leads the procession to the front of the church.
There are three main parts of the church building namely the Narthex (the back part of the church), the Nave (middle part, where the congregation sits during the service, and is flanked by aisles on each side) and the Altar (Sanctuary) where the main service/ mass is held.
Mass
It's a church service which includes the Eucharist, such as a Catholic Mass.
Canon Law specifies that Mass must be held in a sacred place, i.e. a consecrated Church or oratory. It it is has not been consecrated, Mass may not be celebrated until it is. If for some reason a Mass needs to be held outside a Church or oratory, then the Bishop's permission must be received- for each single instance.
Liturgy is the text of a church service and devotional music is that music which is sung in a church service as part of the liturgy.
Yes, there is a special liturgical service held on Good Friday, known as the Good Friday liturgy, but it is not a Mass.
Baptist churches do not have "mass." They have a church service and the time of the service depends on the church. Most churches have service sometime between 9:00 AM and 10:00 AM on Sunday mornings.