The emote-transform API in JavaScript. Transforms normal-English text to Emotes.

ET.js

/**
 * (c) Copyright 2019 nullptr.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

var characterRefrences = {};
var codePoints = {
    start: 97,
    end: 97+26
};

for(var c = codePoints.start; c < codePoints.end; ++c) {
    /* The character which is converted from a double. */ 
    var char = String.fromCharCode(c);
    
    /* Assign each char with a markdown emoji identifier. */
    characterRefrences[char] = `:regional_indicator_${char}:`;
}

function emoteTransform(str) {
    return (
        Array
        .from(str.toLowerCase(), char =>
           /* Checkpoint for whether the char is not in the
     		* specified code-point or not. */
                (characterRefrences[char] ? characterRefrences[char] : char)
        ).join(' ')
	);
};

This script is mainly designed to transform "letters" into "emotes" and works with (Discord, Github). No additional dictionary of emotes is required until its usage is limited to (Discord, Github).

The behaviour is mimicked on a Python code (not attached yet).

This is the Python equivalent of this old shit.

char_to_emoji = dict(((c, f':regional_indicator_{c}:') 
                      for c in map(chr, range(97, 123))))
def emoji_text(s):
    return ' '.join(char_to_emoji.get(c) or c for c in s)
# emoji_text("Hello World")