| Arabic | bulbula | sounds of a caravan |
| Pers., Hindi | bulbul et var. | Nightingale, 337 (and other singers) |
| Arabic: Alg. | bélbé | Melodious Warbler, 380 |
| Aroman. | bilbiliu | Nightingale, 337 |
| Mod.Greek | bourbouli | Nightingale, 337 |
| Turkish | bilbil | (I.-E. substr.) Nightingale, 337 |
| Sbc. | bilisati | to warble |
| Lith. | biloti | to cry, weep |
| Alb. | bëlbëre | talkative |
| Alb. | pata belbë | Bean Goose, 29 |
| Roman. | bîlbîi | to stammer |
| Lat. | bilbire | id. |
| Roman. | bolbolesc | to mumble; bolborosi babble |
| Cat. | bulbena | Barn Owl, 238 |
| Sbc. | bumbulica | Melodious Warbler, 380 |
| Czech | blblán | Corn Bunting, 445 |
| Russian | balabola | talkative; balabolit' to chatter |
| Roman. | balamu | bedlam |
| Ital. | balbellare | to stammer |
| Prov. | balbut | stutterer |
| Esp. | balbucir | to stammer |
| Franç. | balbutier | to splutter |
| Esp.: Extr. | churrabalbeta | Skylark, 297 |
| Cat. | balberoch | Cetti's Warbler, 368 |
| Franç.: Haïti | balbarin | White-winged Dove, 837 |
| Franç.: Haïti | petit balbache | Black-whiskered Vireo, 947 |
| Lith. | blebenti | to chatter |
| Sbc. | belbetati | to chatter; gobbling (turkey, 5) |
| Czech | blaboliti | to ramble on |
| Engl. | blubber | weep loudly |
| Engl. | blab | to chatter |
| Franç. | blague | (b>g) banter. Sans rapport avec blagueàtabacð4.5.6. |
| Alb. | blegërimë | bleating |
| Prov. | barbolá | to mumble |
| Franç.: rég. | barbelo | talkative |
| Franç.: rég. | barbelotte | maybug |
| Franç. (a.litt.) | verbles, verbes, "guebles, juebles" | terme de musique, FEW 23: 141 |
| Franç. (a.litt.) | guerbler | to warble |
| Engl. | warble | to warble. A semantic connection to Germ. wirbel "whirl" is not possible |
| Germ. | wirbeln | to sing (Skylark, 297) |
| Lith. | zvirblys | House Sparrow, 410; zvirbulis id. |
| Lettish | svirbelis | Waxwing, 329 |
| Lettish | svirbula | Buzzard, 211 |