How to internationalize data from DB - dynamic values

Question

I've succeeded in translating my app into multiple language but I've got problems with all the datas coming from my db and also modals.

Does anyone have a solution.

For example where {{day}} and day_in_select in all_days are datas from DB.

                    name="day"
                    onchange="this.form.submit()"
                  >
                    {% if day %}
                    <option value="{{day}}">{{day}}</option>
                    {% endif %}
                    <option value="">{{allDays}}</option>
                    {% for day_in_select in all_days | sort(attribute="order")
                    %}
                    <option value="{{day_in_select.day}}">
                      {{day_in_select.day}}
                    </option>
                    {% endfor %}
                  </select> 

Thanks for your answers.

I am using only json templates to get my translations done, not any .pofiles are used. Also I don't do updates. The translations clicks are done from this code:

@app.route("/language=<language>")
def set_language(language=None):
    session["language"] = language
    locale.setlocale(locale.LC_ALL, language)
    return redirect(url_for("dashboard"))


@babel.localeselector
def get_locale():
    if request.args.get("language"):
        session["language"] = request.args.get("language")
    return session["language"]


app.config["LANGUAGES"] = {
    "en_US": "English",
    "fr_FR": "French",
  
}

@app.context_processor
def inject_conf_var():
    return dict(
        AVAILABLE_LANGUAGES=app.config["LANGUAGES"],
        CURRENT_LANGUAGE=session.get(
            "language",
            request.accept_languages.best_match(app.config["LANGUAGES"].keys()),
        ),
    )

if __name__ == "app":
    app_language = "fr_FR"
    locale.setlocale(locale.LC_ALL, app_language)
    languages = {}

    # language_list = glob.glob("translations/*.json")
    language_list = [
        "en_US",
        "fr_FR",
    ]
    for lang in language_list:
        l = "translations/" + lang + ".json"
        code = lang

        with open(l, "r", encoding="utf8") as file:
            languages[code] = json.loads(file.read())

If anyone has suggestions, let me know.

Thanks so much Chabelle