Use inner monologue. Let the character's thoughts be directly expressed in the text. This gives readers direct access to what's going on in their mind.
One novel way could be through a virtual reality experience. It's immersive and can make the showing really memorable.
You can show love by describing the character's intense emotions and actions towards that thing. Like showing their dedication and care.
You can show someone waving by drawing an outstretched arm with a flowing motion and a hand that's open and moving back and forth.
You can show someone waving by drawing their hand extended out and moving it back and forth. Maybe add some lines to indicate the motion.
You can show it through their internal monologue. Just have them think to themselves in the story and write down those thoughts.
Well, you could show someone in the foreground by having them interact with the background elements differently. Maybe they cast a stronger shadow or are the only one with a distinct expression. Another option is to use a different style of drawing for them compared to the background characters.
You can show someone reading by describing the speed at which they turn the pages. Are they devouring the book quickly or savoring each word slowly? And don't forget to include any reactions they have to the text, like a gasp or a smile.
You could start by having their usual routine disrupted and then no more appearances of them. Or show a scene where they were last seen and then a sudden blackout or fade to white to imply their vanishing. Also, using shadows or silhouettes that disappear could add to the mystery.
One way is to give the character specific speech patterns or accents associated with that language. Another option is to have visual cues like flags or cultural symbols related to the language's origin. Maybe even include a translator character to explain the foreign words.
You can start by always making time for them. Just like we make time to read our favorite novel, give them your undivided attention.