Новые шрифты в темеЕсть решение

Надо сгенерировать font-face в css:

https://cutt.ly/DrUYVTX

Загрузить новые шрифты на сайт. Можно прям через админку. Прописать пути к ним.

В файле user.css нужно добавить строки (если не ошибаюсь, это все упоминания шрифтов в теме), заменив название шрифта на свое:

/** FONTS BEGIN **/
body {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
a {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
input::-webkit-input-placeholder {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
input::-moz-placeholder {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
input:-ms-input-placeholder {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.cat-item__badge-item {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.mfp-wrap .search__input::-webkit-input-placeholder {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.mfp-wrap .search__input::-moz-placeholder {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.mfp-wrap .search__input:-ms-input-placeholder {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.search__input::-webkit-input-placeholder {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.search__input::-moz-placeholder {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.search__input:-ms-input-placeholder {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.mob-tab-button__text {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.submenu__item-li-link {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.horizontal-menu .main-menu__link {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.vertical-menu .mob-tab-button {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.horizontal-menu .main-menu__item + .parent > a {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.mob-sidebar__header-item a {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.sidebar-tags__title {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.bellLight__h {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.blog__menu-text {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.blog__sidebar-mobile-title {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.features__item-title {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.home-cats__item-title {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.slide-cats__title {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.wide-cats__title {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.wide-cats__title {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.home-items__tabs-link {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.color-slider__title {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.color-slider .cat-item__outer .cat-item__add-cart {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.home-brands__title {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.home-news__title {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.item-tags .sidebar-tags__title {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.tippy-tooltip.incart-theme {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.cart-empty__text i {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.checkout__header-link::before {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.success__top-ura {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.account__history-text i {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.cats-grid__title {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.home-feedbacks__title {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.plugin_arrived-custom .plugin_arrived-header span,
.quickorder-custom-form .quickorder-header > span,
.w-dialog-block .quickorder-form [data-quickorder-pfh],
.w-dialog-block .quickorder-form [data-quickorder-cfh] {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.quickorder-form [data-quickorder-cfb] {
    font-family: "PT Sans", Helvetica, sans-serif !important !important;
}
.cart__total [data-quickorder-cb] {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
.uni-btn {
    font-family: "PT Sans", Helvetica, sans-serif !important;
}
/** FONTS END **/