Influent is a good way to add new words to your vocabulary, but also a easy game to get 100% of the achievements.
In this list you will find all the words, note that some few words are wrong ingame, but if you find something wrong in the guide, leave a comment.

-WASD to walk, SPACE to "use/add" things, RMB to interact with objects.
-By pressing CONTROL you can have the precision to click some objects that have others attached, like the Door and it's Knob for example.
-SHIFT make you crouch, there are some objects close to the ground that you need to click sometimes.
-TAB change you to first person, i recommend using it, no need to have this tall guy blocking your vision all the time.
-In the Japanese game you can press R to change it from katakana/hiragana to romaji words.
-Q and E shows the List of words and List of thigs to complete, at Q you can also master the words in a mini-game of tracking what you just added.

-The only different achievement is to crash the plane (FlyBy), just master 50 words and it will unlock in the ESC menu, then crash it somewhere.
-There are 420 words (including Nouns, Adjectives and Verbs), find and master them to get the rest of the achievements.

-There are unlockables in game: a toy plane (FlyBy), different colors for it, and different clothing for the character. All of them unlock by mastering words.
-You don't need to worry about finding the Adjectives and Verbs in the game because after adding a object to the list it will show you a dot before the word, it means it have adj or verbs for you to master.
-In this guide i have added the location (Area) where you can find each object, note that some objects can be found in multiple places. But here they are marked by the lethers: R, K, L and B (Room, Kitchen, Livingroom and Bathroom).

The Portuguese and Japanese words i wrote by miself looking word by word ingame, the English words where copied from the guide of Deltoids here on Steam (to use as base, because that way anyone can use the guide). Sadly the Excel file i made didn't work here (cannot paste it on guides) so i took screenshots from it, they are all the same size and can be printed for study or easy searching ingame.

Hope it helps!

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Below i have posted the raw Excel text for easier CTRL+F (tagging) if needed (same content of the screenshots.

English Portuguese Japanese Adjective Verb Area
Air Conditioner Ar condicionado eakon R
Air Freshener Desodorizador de ambiente shoushuuzai B
Alarm Clock Despertador mazamashi dokei Annoying R
Amplifier Amplificador gitaa ampuu Loud L
Apple Maçã ringo Red K
Ash Tray Cinzeiro haizara L
Baking Sheet Assadeira beekingu torei K
Banana Banana banana Yellow K
Bandages Atadura houtai Heal R
Baseball Beisebol yakyuu Round Throw R
Baseball Bat Taco de beisebol batto Hit R
Baseball Glove Luva de beisebol guroobu Catch R
Basil Manjericão bajiru K
Basin Vasilha senmenki B
Battery Bateria denchi K
Bed Cama beddo Sleep R
Bed frame Estrado beddo fureemu Black R
Beef Carne de boi guyuuniku K
Beer Cerveja biiru Disgusting K
Bell Pepper Pimentão piiman Spicy K
Blanket Cobertor moufu R
Blazer Paletó sebiro Stylish L
Blender Liquidificador mikisaa Blend K
Blinds Persianas buraindo L
Blueberries Mirtilo buruuberii Blue K
Book Livro hon Interesting Read L
Bookshelf Estante de livros hondana L
Bottle Garrafa botoru K
Bottle Opener Abridor de garrafa sennuki K
Bowl Tigela bouru K
Box Caixa hako Store R
Bread Pão pan Brown K
Broom Vassoura houki Sweep K
Bulletin Board Quadro de avisos keijiban Post R
Burner Fogareiro baanaa Hot K
Business Card Cartão de visita meishi R
Butter Manteiga bataa K
Cabbage Repolho kyabetsu Fresh K
Cabinet Armário todana B
Cactus Cacto saboten L
Cake Bolo keeki Delicious K
Calendar Calendário koyomi Plan R
Camera Câmera fotográfica kamera Take (picture) R
Can Lata akikan K
Can Opener Abridor de lata kankiri K
Candle Vela rousoku Light B
Carrot Cenoura ninjin Crunchy K
Cat Gato neko Cute R
CD CD shii dii R
Ceiling Teto tenjou High L
Ceiling Fan Ventilador de teto tenjou sen Rotate L
Celery Aipo serori K
Cereal Cereal shiriaru K
Chair Cadeira isu Sit R
Cheese Queijo chiizu K
Cherries Cerejas sakuranbo K
Chips Batata frita chippusu UnHealthy K
Chocolate Chocolate chokoreeto Addictive K
Chopsticks Palitos hashi K
Cinnamon Canela shinamon K
Clock Relógio tokei K
Closet Armário oshi ire L
Coaster Descanso de panela koosuta L
Coat Rack Cabideiro kooto kake K
Coconut Coco yashinomi K
Comic Book Revista em quadrinhos manga R
Computer Computador konpyuutaa Intelligent R
Conditioner Condicionador rinsu B
Controller Controle kontoroora L
Controls Controles sousa paneru L
Cookies Biscoitos kukkii K
Cooking Oil Óleo de cozinha abura Greasy K
Cooking Pot Panela nabe K
Corn Milho toumorokoshi K
Counter Balcão kauntaa K
Crackers Bolachas kurakkaa K
Cucumber Pepino kyuuri K
Cup Copo kappu Drink L
Curtains Cortinas kaaten K
Cutting Board Tábua manaita Wooden K
Deodorant Desodorante seikanzai Fragrant R
Desk Escrivaninha tsukue R
Dice Dado saikoro Random Roll R
Dirt Terra tsuchi R
Dishwasher Lava Louças shokusenki Wash K
Door Porta doa Open R
Door Frame Batente doa fureemu R
Doorknob Maçaneta doa nobu R
Drain Ralo haisuikou B
Drawer Gaveta hikidashi K
Dresser Cômoda tansu Heavy R
Dustpan Pá de lixo chiritori K
DVD Player Leitor de DVD dvd pureeyaa Old L
Eggplant Beringela nasu Purple K
Eggs Ovos tamago Delicate K
Eraser Borracha keshigomu Erase K
Fan Blades Lâminas do ventilador fanbureedo L
Faucet Torneira jaguchi Drip K
Fish Peixe sakana Smelly K
Flier Panfleto koukoku K
Floor Chão yuka Low Stand R
Floss Fio Dental dentaru furosu B
Flour Farinha komugiko K
Fork Garfo fooku K
Freezer Congelador reitouko Cold K
Frying Pan Frigideira furaipan Hard Fry K
Game Jogo geemu Fun Play L
Game Console Console bideo geemu ki L
Glasses Óculos megane R
Grapes Uvas budou K
Guitar Guitarra gitaa Strum L
Hair Brush Escova de cabelo heaa burashi Brush B
Hammer Martelo kanaduchi Build R
Handle Maçaneta totte K
Hanger Cabide hangaa L
Hat Chapéu boushi K
Headphones Fones de Ouvido heddohon listen R
Hood Exaustor renji fuudo Grey K
Ice Gelo koori Frozen Freeze K
Ice Cream Sorvete aisu kuriimu Melt K
Incense Incenso senkou Burn L
Jam Geléia jamu K
Jar Jarra jaa K
Juice Suco juusu K
Ketchup Ketchup kechappu K
Kettle Chaleira yakan K
Key Chave kagi Metal R
Key Chain Chaveiro kii horudaa R
Keyboard Teclado kiiboodo R
Keys Chaves kagitaba Lose R
Knife Faca naifu Sharp Spread K
Knob Maçaneta daiyaru R
Lamp Lâmpada rampu R
Laptop Laptop rapputoppu L
Laundry Basket Cesto de roupa suja sentaku kago R
Laundry Detergent Sabão em pó senzai R
Leaf Folha ha R
Lemon Limão remon Sour K
Lid Tampa futa R
Light Luz denki R
Light Switch Interruptor de Luz denki suicchi Turn on R
Lighter Isqueiro raitaa Dangerous L
Lime Lima raimu Green K
Lotion Loção rooshon B

English Portuguese Japanese Adjective Verb Area
Magazine Revista zasshi L
Magnet Ímã jishaku K
Marker Marcador maakaa K
Mat Tapete matto K
Matches Fósforos macchi Flammable B
Mattress Colchão mattoresu R
Mayonnaise Maionese mayoneezu K
Microwave Microondas denshi renji K
Milk Leite gyuunyuu White K
Mirror Espelho kagami B
Monitor Monitor monitaa R
Mop Esfregão moppu K
Mouse Mouse mausu R
Movie Filme eiga L
Muffin Bolinha mafin K
Mug Caneca magu kappu L
Mushroom Cogumelo kinoko Squishy K
Mustard Mostarda karashi K
Napkin Guardanapo napukin K
Necktie Gravata nekutai Formal Tie R
Newspaper Jornal shinbun New Ignore K
Notepad Bloco de notas nooto K
Nuts Nozes nattsu K
Onion Cebola tama negi K
Orange Laranja orenji Orange K
Outlet Tomada konsento Charge K
Oven Forno oobun Bake K
Oven Rack Cavalete do forno oobun ami K
Painting Quadro kaiga Beautiful L
Pants Calça zubon R
Paper Papel kami R
Paper Towels Toalha de papel peepaa taoru Clean K
Pasta Macarrão pasuta K
Peach Pêssego momo Pink K
Pear Pêra nashi K
Pen Caneta pen R
Pencil Lápis enpitsu Write R
Pepper Pimenta koshou Sneeze K
Phone Celular keitai Call R
Photograph Fotografica shashin R
Pie Torta pai K
Piggy Bank Cofrinho chokinbako Smart Save R
Pillow Travesseiro makura Soft R
Pills Comprimidos kusuri B
Pineapple Abacaxi painappuru K
Pipes Canos kuda Leaky K
Pitcher Jarro picchaa Pour K
Plant Planta shokubutsu Grow R
Plastic Wrap Papel filme rappu K
Plate Prato sara K
Popsicles Picolé aisu kyandii K
Pork Carne de porco butaniku Juicy K
Poster Pôster posutaa Hang R
Pot Vaso hachi R
Potato Batata jagaimo K
Printer Impressora purintaa Print R
Pumpkin Abóbora kabocha K
Razor Lâmina de barbear kamisori Shave B
Recycle Bin Lixo reciclável risaikuru K
Refrigerator Geladeira reizouko Cool K
Remote Controle remoto rimokon Convenient L
Report Relatório ronbun R
Rice Arroz kome K
Rice Cooker Panela de arroz suihanki K
Rod Vara bou R
Rolling Pin Rolo de massa menbou K
Rug Tapete ragu R
Salt Sal shio Shake K
Sandals Sandálias sandaru K
Sandwich Sanduíche sandoicchi Eat K
Sauce Pan Caçarola soosu pan K
Scarf Cachecol sukaafu R
Scissors Tesoura hasami Cut K
Screwdriver Chave de fenda nejimawashi Screw R
Serving Tray Bandeja obon K
Shampoo Xampu senpatsu B
Shelf Estante tana R
Shirt Camisa shatsu Wear R
Shoe Sapato kutsu L
Shower Chuveiro shawaa B
Shower Head Cabeça do chuveiro shawaa heddo B
Sink Pia nagashi K
Skateboard Skate sukeetoboodo Awesome R
Slippers Chinelos wabaki R
Soap Sabonete sekken B
Soap Dish Detergente sekken oki B
Soccer Ball Bola de futebol sakkaa booru Kick L
Sock Meia kutsushita R
Soda Refrigerante sooda K
Sofa Sofá sofaa Comfortable L
Soy Sauce Molho de soja shouyu K
Spatula Espátula hera K
Speaker Auto-Falante supiikaa R
Sponge Esponja suponji Wet Scrub K
Spoon Colher supuun K
Spray Bottle Borrifador supuree botoru Spray R
Stapler Grampeador hocchikisu R
Stem Tronco kuki R
Sticky Note Bilhete fusen R
Stove Fogão konro Cook K
Strainer Coador zaru K
Strawberry Morango ichigo Pick K
Sugar Açúcar satou Sweet K
Suitcase Mala suutsukeesu pack L
Sweater Agasalho seetaa Warm L
Sweatshirt Suéter paakaa Casual L
Table Mesa teeburu Flat L
Tea Chá cha K
Teacup Xícara tiikappu K
Tissues Lenços de papel tisshu Cry R
Toaster Torradeira toosutaa Toast K
Toilet Banheiro toire Clean Flush B
Toilet Paper Papel higiênico toiretto peepaa B
Toilet Seat Assento benza B
Tomato Tomato tomato K
Tomato Sauce Molho de tomate tomato soosu K
Tool Box Caixa de ferramentas tsuuru bokkusu R
Toothbrush Escova de dentes ha burashi B
Toothpaste Pasta de dentes ha migaki B
Towel Toalha taoru Dry B
Toy Brinquedo omocha L
Trash Can Lixeira gomi ire Dirty Dispose R
Tray Bandeja toree R
TV TV terebi Stupid Watch L
TV Stand Rack terebi dai L
Umbrella Guarda-Chuva kasa Forget K
Underwear Roupa íntima ♥♥♥♥♥♥♥ R
Vacuum Cleaner Aspirador de Pó soujiki Suck L
Vent Ventilação tsuukikou K
Vinegar Vinagre su K
Vitamins Vitaminas bitamin R
Wall Parede kabe Lean R
Wallet Carteira saifu R
Wardrobe Guarda-Roupa waadorobu R
Water Água mizu K
Watermelon Melância suika K
Window Janela mado Closed K
Wine Vinho wain K
Wrench Chave inglesa renchi Tighten R
Yogurt Iogurte yooguruto Healthy K