add spanish language

.github/FUNDING.yml

@@ -9,4 +9,4 @@ community_bridge: # Replace with a single Community Bridge project-name e.g., cl
 liberapay: # Replace with a single Liberapay username
 issuehunt: # Replace with a single IssueHunt username
 otechie: # Replace with a single Otechie username
-custom: ["https://www.paypal.me/yang991178", "https://hyliu.me/fluent-reader/imgs/alipay.jpg", "https://hyliu.me/fluent-reader/imgs/wechat-pay.jpg"]
+custom: ["https://www.paypal.me/yang991178", "https://hyliu.me/fluent-reader/imgs/alipay.jpg"]

package.json

@@ -37,7 +37,8 @@
       "languages": [
         "zh-CN",
         "en-US",
-        "fr-FR"
+        "fr-FR",
+        "es"
       ],
       "showNameOnTiles": true,
       "setBuildNumber": true

src/components/settings/app.tsx

@@ -80,6 +80,7 @@ class AppTab extends React.Component<AppTabProps, AppTabState> {
     languageOptions = (): IDropdownOption[] => [
         { key: "default", text: intl.get("followSystem") },
         { key: "en-US", text: "English" },
+        { key: "es", text: "Español"},
         { key: "fr-FR", text: "Français"},
         { key: "zh-CN", text: "中文（简体）"},
     ]

src/scripts/i18n/README.md

@@ -0,0 +1,12 @@
+## Internationalization
+
+Currently, Fluent Reader supports the following languages.
+
+| Locale | Language | Credit |
+| --- | --- | --- |
+| en-US | English | [@yang991178](https://github.com/yang991178) |
+| es | Español | [@kant](https://github.com/kant) |
+| fr-FR | Français | [@Toinane](https://github.com/Toinane) |
+| zh-CN | 中文（简体） | [@yang991178](https://github.com/yang991178) |
+
+Refer to the repo of [react-intl-universal](https://github.com/alibaba/react-intl-universal) to get started on internationalization. 

src/scripts/i18n/_locales.ts

@@ -1,11 +1,13 @@
 import en_US from "./en-US.json"
 import zh_CN from "./zh-CN.json"
 import fr_FR from "./fr-FR.json"
+import es from "./es.json"
 
 const locales = {
     "en-US": en_US,
     "zh-CN": zh_CN,
     "fr-FR": fr_FR,
+    "es": es,
 }
 
 export default locales

src/scripts/utils.ts

@@ -35,7 +35,7 @@ export async function parseRSS(url: string) {
             throw new Error(result.statusText)
         }
     } catch {
-        throw new Error("A network error has occured.")
+        throw new Error("A network error has occurred.")
     }
 }